Handling pre-2.5 images.

Author: cincuranet

Provider/src/FirebirdSql.Data.FirebirdClient/Client/Native/FbClientFactory.cs

@@ -77,7 +77,7 @@ public static IFbClient Create(string dllName)
 			var result = cache.GetOrAdd(dllName, s => { createdNew = true; return BuildFbClient(s); });
 			if (createdNew)
 			{
-				ShutdownHelper.RegisterFbClientShutdown(() => result.fb_shutdown(0, 0));
+				ShutdownHelper.RegisterFbClientShutdown(() => ShutdownEntryPointWrapper(result));
 			}
 			return result;
 		}
@@ -305,5 +305,22 @@ private static string SanitizeBaseName(string baseName)
 
 			return "FB_" + Math.Abs(baseName.GetHashCode());
 		}
+
+		private static void ShutdownEntryPointWrapper(IFbClient fbClient)
+		{
+			// the fb_shutdown does not exists before 2.5
+			// the exception is just ignored
+			// once <2.5 is not existing we can remove this
+			try
+			{
+				fbClient.fb_shutdown(0, 0);
+			}
+#if NETSTANDARD1_6
+			catch (Exception ex) when (ex.GetType().Name == "EntryPointNotFoundException")
+#else
+			catch (EntryPointNotFoundException)
+#endif
+			{ }
+		}
 	}
 }